One item I bought about 6 of is little matching cards in topics such as analogies, synonyms, chemical elements, US History, etc. You can play matching games with the cards. I thought the cards look too flimsy to hold up for long and also, I wanted to make the game a little more inviting to play.
So I started by photo-copying the cards while they were still attached correctly together. These copies will become the self-checking answer keys.
Then, I went on to sorting the question cards from the answer cards and gluing them onto a piece of card stock. The questions are on one side, the answers down the other but in random order.
I will laminate these sheets and place them with the answer keys, into a pocket folder.
Here's what my kids will like about using them: I plan to add in either a packet of Benda-roos or Wikki-Stix to use to match up the correct cards. Or I may simply put 10 or so lengths of yarn or ribbon into the pocket to use for matching the items. Now you have a sturdy, reusable matching game that uses strings for matching instead of drawing lines.
My daughter has been begging for Benda-Roos, so I will definetely grab some to use for these types of games. Also, they are handy to use for "tracing" outlines of letters or pictures. I have lots of clip art/bulletin board books with large patterns. I can tear out a page (or copy it), place it in a sheet protector, and let her outline the shape with the Benda-Roos.